What fits in each slot
| Slot | Formats | Interface | Workflow note |
|---|---|---|---|
| Slot 1 | SD/SDHC/SDXC | UHS-I / UHS-II | One of two UHS-II-compatible slots. |
| Slot 2 | SD/SDHC/SDXC | UHS-I / UHS-II | Supports dual-card workflows with Slot 1. |
When faster media matters
Everyday recommendation
U3/V30 SDXC is a practical floor for many 4K settings, but follow Canon's row for the selected bit depth and frame rate.
Demanding recommendation
V60 UHS-II SDXC for listed 4K 50/60p 10-bit and Full HD 150/180p 10-bit modes.
Canon specifies V60 or higher for several 10-bit high-frame-rate combinations; 8-bit versions may call for U3 instead.
Plan the complete workflow
Capacity
The camera supports SD, SDHC, and SDXC. Format the cards in camera and use equal-performance cards for duplicate recording.
Reader
A UHS-II SD reader preserves the transfer advantage of UHS-II cards.
Three checks worth making
- Both cards should meet the active recording mode when duplicating movies.
- A V60 requirement can depend on 10-bit capture even at the same resolution.
- Test the intended 4K setting before a paid job.
Verify the current requirement
StorageSift summarizes the manufacturer's documentation; firmware, card qualification, and recording options can change. Recheck the source for the exact mode and capacity you plan to use.
Canon EOS R6 Mark II manual: specifications and card requirements ↗Source checked August 13, 2026